Answer:
each sold 60 tickets
Step-by-step explanation:
Apparently, you're supposed to set the expressions equal and solve for t; then find the values of the expressions.
60(t -1) = 20(t +1)
60t -60 = 20t +20 . . . . . eliminate parentheses
40t = 80 . . . . . . . . . . . . . . add 60 -20t
t = 2 . . . . . . . . . . . . . . . . . . divide by 40
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60(2 - 1) = 60 . . . . . solve for Falcons sales
20(2 + 1) = 60 . . . . .solve for Eagles sales (should be equal; it is)
Each team sold 60 tickets.